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A Policy

  • Policy is a collection of policy alternatives (OR)
    • Auth tokens: Kerberos OR X509
  • Policy alternative is a collection of policy assertions (AND)
    • Auth token AND secure channel
  • Policy assertions specify
    • traditional policies that will ultimately manifest on the wire (authentication scheme, transport protocol selection), and
    • critical to proper service selection and usage (privacy policy, QoS characteristics).
  • Two "operators" (XML tags) are used to make statements about policy combinations:
    • wsp:ExactlyOne - asserts that only one child node must be satisfied.
    • wsp:All - asserts that all child nodes must be satisfied.
  • The intersection is a new policy that complies with both their requirements/capabilities

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